| (19) |
 |
|
(11) |
EP 0 306 334 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
26.04.1989 Bulletin 1989/17 |
| (43) |
Date of publication A2: |
|
08.03.1989 Bulletin 1989/10 |
| (22) |
Date of filing: 02.09.1988 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT NL SE |
| (30) |
Priority: |
04.09.1987 US 93544
|
| (71) |
Applicant: BRIGHAM YOUNG UNIVERSITY |
|
Provo
Utah 84602 (US) |
|
| (72) |
Inventors: |
|
- Bradshaw, Jerald S.,
Provo, Utah 84604 (US)
- Izaat Reed M.,
Provo, Utah 84604 (US)
- Bruening, Ronald L.,
Provo, Utah 84661 (US)
- Christensen, James J.
Deceased (US)
|
| (74) |
Representative: Kearney, Kevin David Nicholas et al |
|
KILBURN & STRODE
30 John Street
London, WC1N 2DD
London, WC1N 2DD (GB) |
|
| |
|
| (54) |
Macrocyclic ligands bonded to silica or silica gel and their use in selectively and
quantitatively removing and concentrating ions present at low concentrations from
mixtures thereof with other ions |
(57) The invention has composition of matter and process aspects. The composition of matter
aspect relates to certain macrocyclic compounds bonded to silica or silica gel.
The process aspect involves the use of any of these compositions of matter packed
in a column through which a solution of the multiple ions is flowed to complex with
the macrocyclic compound and separate a desired selected ion from a multiple ion solution,
breaking the complex by flowing a receiving liquid through the column to free the
desired ion and recovering the freed desired ion from the receiving liquid.